Insulating-ring and bracket.



PATENTBD JAN. 29, 19.07.

F. B. 000K. INSULATING RING AND BRACKET.

APPLICATION FILED DEG.28.1905.

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UNrrED sfrarns PATENT oFFIoE FRANK B. COOK, OF CHICAGO, ILLINOIS.'

INSULATING-RING AND BRACKET.

Specification of Letters Patent.

Patented Jan. 29, 1907'.

Apulzcaticu tiled December 28,1905. Serial No. 293.662,

To all whom, if muy con/:(1771,:

Be 1t known that I, FRANK B. (ook, a citizen of the United States of America. and a trating same.

My invention relates to insulating-rings or the like, such as are used for supporting or carrying electrical conductors, especially where the conductors are to be distributed, asin a cross-connecting board or the like for telephone-exchanges, my object being` first, to yprovide improved means for insulating the ring;` second, to provide improved means for supporting the ring; third` to provide iinproved means for supportingr the distribut- -mg strips, bloc-ks, or the like' in position on the cross-connecting board or the like, and. fourth, to embody simplicity and cheapness of manufacture in such a piece of apparatus.

Heretofore in cross-connecting boards for telephone-exchanges it has b een the practice to attach each distributing block or strip to the iron'frarnework of the board by one or more castiron brackets, which were bolted to the said block or strip and to the horizontal arms of the board, and to rovide one or more distributing-rings bac of the said block or strip, which rings. were entirely separate from the said brackets and which were supported by the said horizontal arms. It has also been the practice to insulate the distributingv-rings by enameling them with a porcelain enamel orsome like material in order to prevent the insulated wires from comi110' in contact with the metal of the rings.

lln my present invention I preferalily -make the distributing-ring and the terminalst-rip-supporting bracket out of a single sheet-metal punching and cover the ring with an insulating material, such as hard rubber or fiber, which is put on in a single iece, so as to cover the inner surface and oth sides thereof, thus doing away with the separate pieces of the bracket and ring in the old construction and providing a bracket and ring which may be very cheaply manufacturved and which is very substantial. T he bracket may be readily secured to an arm of the cross-connecting board or the like, thus securing the ring in place and providing means for mounting the terminal block or stri;

/In the drawings, Figure 1 is a rearview of the insulating-ring and bracket. Fig. 2 is a side view of the insulating-ring and bracket with a portion of the ring on line A A, Fig.

1 removed; and Figsi, 4, and 5 are rear, l

side, and front views, respectively, of a distribuiting-block with the insulating-ring and bracket secured thereto. A

Like characters refer to like parts in the several figures.

The bracket 1 and ring 3 are formed up out of a. single piece of'sheet metal, preferably sheet-steel, preferably as shown in Figs. 1 and 2. The bracket is provided wit-h ears -1 i for securing the terminal block 12 thereto and is formed with side pieces 8 S, so as to t around channel-iron 9 of the cross-connecting board. The lbracket is preferably secured to the channel-iron 9 by bolt l1, the side flanges 8 S holding it securely in )osition. The terminal bloc-k 12, preferably of hard maple, is )rovided with hard-rubber strip 15, secure to its face and carrying metallic terminal strips 1l 11. forced through suitable holds in 15 and bent so as to securely hold them in place.

The rubber 6 before it is put on the ring 3 is a ilat soft ring. This rubber ring is folded around the .metal ring 23, as shown in the drawings, and is then heated and vulcanized on the metal ring 3 until it is hard, thus producing a hard-rubber covering for the ring 3. This hard-rubber covering protects the wires or conductors carried by the ring from the metal part of the ring and affords the best of insulation for the ring 3. The thickness of the rubber 6 may be made as great as desired. The portion 2, connecting the bracket 1 with. the ring 3, serves to support the insulating-ring very rigidly. The conductors in a cross-connecting board or the like extend through the insulating-rimT 6 and the holes 13 13 in the distributing-block 12 to the terminal strips 1i 14.

In making the ring 3 and bracket 1 the same is iirst punched out of suitable sheet metal and then formed as shown in Figs. l and 2, Then the ring 3 is covered with the rubber, fiber, or any suitable insulating materia-l, as described above. f

I do not wish to limit this invention to the particular details of construction as herein shown nor tothe particular forni of termina-l block illustrated. Neither do I wish to limit the insulating-covering for the ring 3 to hard rubber or fiberI IIO subscribing Witnesses, this 3. A sheet-metal braeketformed as e vcheri` nel und :i ring at right angles to the channel, 15 and e piece of herd rubber 'conformed tothe ring so as to insulate the inner portion 'end jen-ch side thereof.

l As inventor oi" the foregoing I hereunto subscribe my neme, in the presence of two zo 26th day of December, 1905.

` FRANK B. COOK.

Witnesses:

FREDERICK R. PARKER, 

